package com.bfl.mybatis.generator.plugins;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.dom.java.*;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.Element;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;

import java.util.List;

public class FieldsPlugin extends PluginAdapter {

    @Override
    public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) {
        // add field, getter, setter for limit clause
        addFields(topLevelClass, introspectedTable, "fields");
        return super.modelExampleClassGenerated(topLevelClass, introspectedTable);
    }

    @Override
    public boolean sqlMapBaseColumnListElementGenerated(XmlElement element, IntrospectedTable introspectedTable) {

        XmlElement isNullElement = new XmlElement("if"); //$NON-NLS-1$
        isNullElement.addAttribute(new Attribute("test", "fields == null")); //$NON-NLS-1$ //$NON-NLS-2$
        //isNotNullElement.addAttribute(new Attribute("compareValue", "0")); //$NON-NLS-1$ //$NON-NLS-2$
        for (Element e : element.getElements()) {
            isNullElement.addElement(e);
        }
        element.getElements().clear();
        element.addElement(isNullElement);

        XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
        isNotNullElement.addAttribute(new Attribute("test", "fields != null")); //$NON-NLS-1$ //$NON-NLS-2$
        //isNotNullElement.addAttribute(new Attribute("compareValue", "0")); //$NON-NLS-1$ //$NON-NLS-2$
        isNotNullElement.addElement(new TextElement("${fields}"));
        //isParameterPresenteElemen.addElement(isNotNullElement);
        element.addElement(isNotNullElement);

        return super.sqlMapBaseColumnListElementGenerated(element, introspectedTable);
    }

    private void addFields(TopLevelClass topLevelClass, IntrospectedTable introspectedTable, String name) {
        CommentGenerator commentGenerator = context.getCommentGenerator();
        Field field = new Field();
        field.setVisibility(JavaVisibility.PROTECTED);
//        field.setType(FullyQualifiedJavaType.getIntInstance());
        field.setType(PrimitiveTypeWrapper.getStringInstance());
        field.setName(name);
//        field.setInitializationString("1");
        commentGenerator.addFieldComment(field, introspectedTable);
        topLevelClass.addField(field);
        char c = name.charAt(0);
        String camel = Character.toUpperCase(c) + name.substring(1);
        Method method = new Method();
        method.setVisibility(JavaVisibility.PUBLIC);
        method.setName("set" + camel);
        method.addParameter(new Parameter(PrimitiveTypeWrapper.getStringInstance(), name));
        method.addBodyLine("this." + name + "=" + name + ";");
        commentGenerator.addGeneralMethodComment(method, introspectedTable);
        topLevelClass.addMethod(method);
        method = new Method();
        method.setVisibility(JavaVisibility.PUBLIC);
        method.setReturnType(PrimitiveTypeWrapper.getStringInstance());
        method.setName("get" + camel);
        method.addBodyLine("return " + name + ";");
        commentGenerator.addGeneralMethodComment(method, introspectedTable);
        topLevelClass.addMethod(method);
    }


    @Override
    public boolean sqlMapSelectByPrimaryKeyElementGenerated(XmlElement element, IntrospectedTable introspectedTable) {

        List<Element> elements = element.getElements();
        StringBuilder columns = new StringBuilder();

        List<IntrospectedColumn> allColumns = introspectedTable.getAllColumns();
        for (IntrospectedColumn introspectedColumn : allColumns) {
            columns.append(",").append(introspectedColumn.getActualColumnName());
        }
        columns.deleteCharAt(0);
        elements.set(1, new TextElement(columns.toString()));

        return super.sqlMapSelectByPrimaryKeyElementGenerated(element, introspectedTable);
    }

    /**
     * This plugin is always valid - no properties are required
     */
    public boolean validate(List<String> warnings) {
        return true;
    }
}
